多用户分段移位差分混沌键控通信方案  

Multiuser Communication Scheme Based on Segment Shift Differential Chaos Shift Keying

作　　者：张刚[1] 孟维[1] 张天骐[1] 

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室

出　　处：《电子与信息学报》2017年第5期1219-1225,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61371164);重庆市杰出青年基金(CSTC2011jjjq40002);重庆市教育委员会科研项目(KJ130524)~~

摘　　要：为了满足现代通信的需求,多用户接入技术是近年来混沌通信的一个重要发展趋势。为了进一步改善现有多用户混沌通信方案的误码性能,该文提出一种多用户分段移位差分混沌键控(Multi User Segment Shift Differential Chaos Shift Keying,MU-SSDCSK)通信方案。该方案根据传输的用户数,将MU-SSDCSK中的参考信号等分成m个信号段,再将这m个信号段进行移位,并配以不同的Walsh码,形成相互正交的信息携带信号。文中推导了该系统在加性高斯白噪声信道中的理论误码率公式并进行了仿真。仿真结果表明,该文提出的MU-SSDCSK方案能有效改善系统误码性能,在混沌通信领域具有一定的应用前景。In order to meet the demand of modern communication, multiuser access technology is an important development trend of current chaotic communication. To improve the Bit Error Rate （BER） performance of the existing multiuser chaotic communication schemes, a MultiUser communication scheme based on Segment Shift Differential Chaos Shift Keying （MU-SSDCSK） is proposed. According to the users＇ number in transmission, the reference signal of MU-SSDCSK is divided into m segments, which are then shifted and matched with different Walsh codes that therefore can make the information-bearing signals orthogonal to each other. The theoretical BER formula of this new scheme is derived in Additive White Gaussian Noise （AWGN） channel. The simulation results show that the proposed scheme can effectively improve BER performance, and has certain application prospect in the chaotic communication field.

关 键 词：多用户 WALSH码 分段移位 传输速率 比特误码率 

分 类 号：TN918[电子电信—通信与信息系统]